Malicious PDF — malware analysis report

Static analysis result for SHA-256 d813e46ad3de9088…

MALICIOUS

PDF

84.5 KB Created: 2021-09-03 02:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: a79f8f7c175606697ebc7bb38c120b6b SHA-1: ed689e180c779ced90b57634a0a3b7564c04d719 SHA-256: d813e46ad3de9088ec30aafb3a49e5de0d5676a171c26b9807d2f28210a4f007
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to numerous PDF files hosted on potentially compromised or disposable domains, suggesting a phishing or malware distribution campaign. The presence of external URIs and the structure of the PDF indicate it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://royalgoodviewresort.com/Uploads/file/velakisifewonixanoxu.pdf In PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f69830c77---45440012877.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/rovapelalijodogeri.pdfIn PDF document text
    • https://aedwea.com/upload/foto/71673915141.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/857350061.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/mowabebidenarewuku.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a82672a44---37659751331.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c93747c3c7d---46712787531.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/xabum.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608536a2d7913---83361229388.pdfIn PDF document text
    • https://soswzgierz.pl/web/uploads/files/47455091731.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/18986480673.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e3555c0b3---vopunalafafivemowaxolupar.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7d933c7f2---pabowadolojidozawom.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210708_72D30AC0CBB23266.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c5144ae0369---povoma.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/66583636790.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/i0qn91897vkqu9om5cobupsvs6/tifigojezevazud.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210818042328681.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/e02db194cc97ef1f780f1e13e66c2a7d/51766268909.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160e034e1a8deb---44786934466.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/xanux.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830f1265c8d---foxokilanuxopisiwiwosu.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/4057052528.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=cognitive+test+questions+and+answers+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC6 19604 bytes
SHA-256: a40e747bd9e8e58e3c1219e6333d5f3d71cb5a71c28ae74125be7a7c44ef54a3
font_01_sfnt_off00011301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11301 11056 bytes
SHA-256: 2c3e18fd9ae86a02b45e441424d34999965b7ab619568eacb7ed920a11aee5e8
font_02_sfnt_off00012c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1